订货号	包装规格
663-952-12	25 mm x 25 mm

半岛bd体育手机客户端 参数

Purity[纯度]	99.95%
Thickness[厚度]	3mm
Thermal Properties(热性能)
Coefficient of thermal expansion ( x10?? K?? )	37.000 @0-100℃
Latent heat of evaporation ( J g?? )	333
Latent heat of fusion ( J g?? )	69.00
Melting point ( C )	217.00
Specific heat ( J K?? kg?? )	321.0 @25℃
Thermal conductivity ( W m?? K?? )	0.50 @0-100℃
Atomic Properties(原子属性)
Atomic number	34
Atomic weight ( amu )	78.96000
Crystal structure	Hexagonal
Electronic structure	Ar3d??4s?4p?
Ionisation potential ( No./eV )	4 / 42.9
Ionisation potential ( No./eV )	6 / 81.7
Ionisation potential ( No./eV )	5 / 68.3
Ionisation potential ( No./eV )	1 / 9.75
Ionisation potential ( No./eV )	3 / 30.8
Ionisation potential ( No./eV )	2 / 21.2
Natural isotope distribution ( Mass No./% )	76 / 9.0
Natural isotope distribution ( Mass No./% )	82 / 9.2
Natural isotope distribution ( Mass No./% )	74 / 0.9
Natural isotope distribution ( Mass No./% )	80 / 49.8
Natural isotope distribution ( Mass No./% )	77 / 7.6
Natural isotope distribution ( Mass No./% )	78 / 23.5
Photo-electric work function ( eV )	5.90
Thermal neutron absorption cross-section ( Barns )	12.2000
Valences shown	-2 ,4,6
Physical Properties(物理性质)
Boiling point ( C )	685
Density ( g cm?? )	4.790 @20℃
Mechanical Properties(机械性能)
Bulk modulus ( GPa ) ( Polycrystalline )	8.3
Hardness - Mohs ( Polycrystalline )	2.00
Material condition	Polycrystalline
Poisson's ratio ( Polycrystalline )	0.447
Tensile modulus ( GPa ) ( Polycrystalline )	58.00
Electrical Properties(电气特性)
Electrical resistivity ( μOhmcm )	12@20℃

其他参数

公差

长度	<100mm	±1mm
	≥100mm	+2% / -1%
直径	<100mm	±1mm
	≥100mm	+2% / -1%
厚度	<0.01mm	±25%
	≤0.05mm	±15%
	>0.05mm	±10%
长度 1	<100mm	±1mm
	≥100mm	+2% / -1%
长度 2	<100mm	±1mm
	≥100mm	+2% / -1%

环境

进入环境后可对环境的一个或多个组成部分构成即时或延迟危害的化学品。